[PATCH 6/6] net/phy: Expose 100base-T capability only

[Joel Stanley]

On Thu, May 5, 2016 at 10:57 AM, Cyril Bur <cyrilbur at gmail.com> wrote:
> From: Gavin Shan <gwshan at linux.vnet.ibm.com>
>
> I don't know the specific PHY model deployed on Firestone BMC, but
> currently used one (PHY_ID_BCM54210E) isn't correct. BCM54210E
> supports 1000base-T but the PHY on Firestone BMC shouldn't support
> that mode as uboot uses 100base-T mode.
>
> When exposing 1000base-T capability, the MAC is forced to have the
> same mode though the PHY is working in 100base-T mode in fact. It
> causes the mode mismatch between PHY/MAC and the ethernet network
> doesn't work.
>
> It's a temporary fix. After the PHY model is confirmed, we need
> to enable the correct PHY driver instead current one for BCM54210E.
>
> Signed-off-by: Gavin Shan <gwshan at linux.vnet.ibm.com>
>
> [Cyril]
> The plot thickens, it does appear that this IS the correct PHY on
> firestones. This patch is definitely required for networking to be
> functional though.

We should get someone in Austin to boot a firestone without this patch
and see what it does. You shouldn't need a pdu as long as you get it
right the first time :)

Joel